IBM recently previewed a yet-to-be released iPhone app—Breadcrumbs—that will give consumers immediate access to information about food products while they shop.  By scanning an item's barcode with your iPhone camera, you will be able to receive a summary of a product's ingredients and learn when it was manufactured (oh, at long last, to know how old that package of Ho-Hos really is!)  Granted, ingredients are already listed on food labels, but recall information isn't, and according to this ReadWriteWeb post, Breadcrumbs will be able to put this kind of product history in the palm of your hand.